| Rt Hon Robert Anthony Eden | June 1935 | December 1935 |
| Rt Hon John Selwyn Brooke Lloyd | November 1951 | October 1954 |
| Joseph Bradshaw Godber | 1961 | June 1963 |
| George Morgan Thomson | October 1964 | April 1966 |
| Rt Hon George Morgan Thomson | January 1967 | August 1967 |
| Rt Hon Frederick William Mulley | January 1967 | October 1969 |
| Rt Hon Geoffrey William Hoon | 5 May 2006 | 28 June 2007 |
| Rt Hon Hugo George William Swire | 4 September 2012 | |
| Rt Hon Sir Alan James Carter Duncan | 16 July 2016 | 22 July 2019 |
| Roderick James Nugent Stewart | 15 June 2017 | 9 January 2018 |
| Dr Andrew William Murrison | 9 May 2019 | 13 February 2020 |
| Andrew George Stephenson | 25 July 2019 | 13 February 2020 |